Home / 57,858.40-86,787.60-20,913.76

Finding the Fourth Proportional to 57,858.40, 86,787.60 and 20,913.76

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Solution

The fourth proportional to 57,858.40, 86,787.60 and 20,913.76 is: 31,370.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,858.40 : 86,787.60 = 20,913.76 : x
  2. Step 2: Convert to fraction form
    57,858.40/86,787.60 = 20,913.76/x
  3. Step 3: Cross multiply
    57,858.40x = 86,787.60 × 20,913.76
  4. Step 4: Simplify right side
    57,858.40x = 1,815,055,037.38
  5. Step 5: Solve for x
    x = 1,815,055,037.38/57,858.40
  6. Step 6: Final answer
    x = 31,370.64

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.